* [PATCH 1/2] drm/msm: Call msm_init_vram before binding the gpu
@ 2020-12-30 15:29 Iskren Chernev
2020-12-30 15:29 ` [PATCH 2/2] drm/msm: Add modparam to allow vram carveout Iskren Chernev
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: Iskren Chernev @ 2020-12-30 15:29 UTC (permalink / raw)
To: Rob Clark
Cc: Akhil P Oommen, Bjorn Andersson, Brian Masney, Daniel Vetter,
David Airlie, dri-devel, freedreno, Iskren Chernev,
Jonathan Marek, Jordan Crouse, linux-arm-msm, linux-kernel,
Sean Paul, Sharat Masetty, Shawn Guo, Wambui Karuga,
~postmarketos/upstreaming, Craig Tatlor
From: Craig Tatlor <ctatlor97@gmail.com>
vram.size is needed when binding a gpu without an iommu and is defined
in msm_init_vram(), so run that before binding it.
Signed-off-by: Craig Tatlor <ctatlor97@gmail.com>
---
drivers/gpu/drm/msm/msm_drv.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 535a0263ceeb4..108c405e03dd9 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -457,14 +457,14 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
drm_mode_config_init(ddev);
- /* Bind all our sub-components: */
- ret = component_bind_all(dev, ddev);
+ ret = msm_init_vram(ddev);
if (ret)
goto err_destroy_mdss;
- ret = msm_init_vram(ddev);
+ /* Bind all our sub-components: */
+ ret = component_bind_all(dev, ddev);
if (ret)
- goto err_msm_uninit;
+ goto err_destroy_mdss;
dma_set_max_seg_size(dev, UINT_MAX);
base-commit: d7a03a44a5e93f39ece70ec75d25c6088caa0fdb
prerequisite-patch-id: aba6f684932cab35d98457c21e4ff7a5ac75c753
prerequisite-patch-id: 4884d57df1bd197896b69e115d9002d6c26ae2e2
--
2.29.2
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 2/2] drm/msm: Add modparam to allow vram carveout
2020-12-30 15:29 [PATCH 1/2] drm/msm: Call msm_init_vram before binding the gpu Iskren Chernev
@ 2020-12-30 15:29 ` Iskren Chernev
2020-12-30 22:23 ` [PATCH 1/2] drm/msm: Call msm_init_vram before binding the gpu Brian Masney
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Iskren Chernev @ 2020-12-30 15:29 UTC (permalink / raw)
To: Rob Clark
Cc: Akhil P Oommen, Bjorn Andersson, Brian Masney, Daniel Vetter,
David Airlie, dri-devel, freedreno, Iskren Chernev,
Jonathan Marek, Jordan Crouse, linux-arm-msm, linux-kernel,
Sean Paul, Sharat Masetty, Shawn Guo, Wambui Karuga,
~postmarketos/upstreaming
Using the GPU with a VRAM Carveout is a security vulnerability.
Nevertheless it is sometimes required, especially when no IOMMU
implementation is available for a certain platform.
Signed-off-by: Iskren Chernev <iskren.chernev@gmail.com>
---
drivers/gpu/drm/msm/adreno/a2xx_gpu.c | 6 ++++--
drivers/gpu/drm/msm/adreno/a3xx_gpu.c | 6 ++++--
drivers/gpu/drm/msm/adreno/a4xx_gpu.c | 6 ++++--
drivers/gpu/drm/msm/adreno/adreno_device.c | 4 ++++
drivers/gpu/drm/msm/adreno/adreno_gpu.h | 1 +
5 files changed, 17 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/msm/adreno/a2xx_gpu.c b/drivers/gpu/drm/msm/adreno/a2xx_gpu.c
index 7e82c41a85f1a..bdc989183c648 100644
--- a/drivers/gpu/drm/msm/adreno/a2xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a2xx_gpu.c
@@ -534,8 +534,10 @@ struct msm_gpu *a2xx_gpu_init(struct drm_device *dev)
if (!gpu->aspace) {
dev_err(dev->dev, "No memory protection without MMU\n");
- ret = -ENXIO;
- goto fail;
+ if (!allow_vram_carveout) {
+ ret = -ENXIO;
+ goto fail;
+ }
}
return gpu;
diff --git a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
index 93da6683a8661..4534633fe7cdb 100644
--- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
@@ -564,8 +564,10 @@ struct msm_gpu *a3xx_gpu_init(struct drm_device *dev)
* implement a cmdstream validator.
*/
DRM_DEV_ERROR(dev->dev, "No memory protection without IOMMU\n");
- ret = -ENXIO;
- goto fail;
+ if (!allow_vram_carveout) {
+ ret = -ENXIO;
+ goto fail;
+ }
}
icc_path = devm_of_icc_get(&pdev->dev, "gfx-mem");
diff --git a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
index c0be3a0f36b2c..82bebb40234de 100644
--- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
@@ -692,8 +692,10 @@ struct msm_gpu *a4xx_gpu_init(struct drm_device *dev)
* implement a cmdstream validator.
*/
DRM_DEV_ERROR(dev->dev, "No memory protection without IOMMU\n");
- ret = -ENXIO;
- goto fail;
+ if (!allow_vram_carveout) {
+ ret = -ENXIO;
+ goto fail;
+ }
}
icc_path = devm_of_icc_get(&pdev->dev, "gfx-mem");
diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
index 87c8b033ad1a6..12e75ba360f95 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_device.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
@@ -18,6 +18,10 @@ bool snapshot_debugbus = false;
MODULE_PARM_DESC(snapshot_debugbus, "Include debugbus sections in GPU devcoredump (if not fused off)");
module_param_named(snapshot_debugbus, snapshot_debugbus, bool, 0600);
+bool allow_vram_carveout = false;
+MODULE_PARM_DESC(allow_vram_carveout, "Allow using VRAM Carveout, in place of IOMMU");
+module_param_named(allow_vram_carveout, allow_vram_carveout, bool, 0600);
+
static const struct adreno_info gpulist[] = {
{
.rev = ADRENO_REV(2, 0, 0, 0),
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
index c3775f79525a7..fe5444a1482ae 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
@@ -18,6 +18,7 @@
#include "adreno_pm4.xml.h"
extern bool snapshot_debugbus;
+extern bool allow_vram_carveout;
enum {
ADRENO_FW_PM4 = 0,
--
2.29.2
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] drm/msm: Call msm_init_vram before binding the gpu
2020-12-30 15:29 [PATCH 1/2] drm/msm: Call msm_init_vram before binding the gpu Iskren Chernev
2020-12-30 15:29 ` [PATCH 2/2] drm/msm: Add modparam to allow vram carveout Iskren Chernev
@ 2020-12-30 22:23 ` Brian Masney
2021-01-03 6:09 ` Alexey Minnekhanov
2021-03-01 19:59 ` patchwork-bot+linux-arm-msm
3 siblings, 0 replies; 5+ messages in thread
From: Brian Masney @ 2020-12-30 22:23 UTC (permalink / raw)
To: Iskren Chernev
Cc: Rob Clark, Akhil P Oommen, Bjorn Andersson, Daniel Vetter,
David Airlie, dri-devel, freedreno, Jonathan Marek,
Jordan Crouse, linux-arm-msm, linux-kernel, Sean Paul,
Sharat Masetty, Shawn Guo, Wambui Karuga,
~postmarketos/upstreaming, Craig Tatlor
On Wed, Dec 30, 2020 at 05:29:42PM +0200, Iskren Chernev wrote:
> From: Craig Tatlor <ctatlor97@gmail.com>
>
> vram.size is needed when binding a gpu without an iommu and is defined
> in msm_init_vram(), so run that before binding it.
>
> Signed-off-by: Craig Tatlor <ctatlor97@gmail.com>
For the series:
Reviewed-by: Brian Masney <masneyb@onstation.org>
Next time, please include a cover letter so that tags added to the cover
letter can be applied to all patches in the series via patchwork.
Brian
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] drm/msm: Call msm_init_vram before binding the gpu
2020-12-30 15:29 [PATCH 1/2] drm/msm: Call msm_init_vram before binding the gpu Iskren Chernev
2020-12-30 15:29 ` [PATCH 2/2] drm/msm: Add modparam to allow vram carveout Iskren Chernev
2020-12-30 22:23 ` [PATCH 1/2] drm/msm: Call msm_init_vram before binding the gpu Brian Masney
@ 2021-01-03 6:09 ` Alexey Minnekhanov
2021-03-01 19:59 ` patchwork-bot+linux-arm-msm
3 siblings, 0 replies; 5+ messages in thread
From: Alexey Minnekhanov @ 2021-01-03 6:09 UTC (permalink / raw)
To: Iskren Chernev, Rob Clark
Cc: Akhil P Oommen, Bjorn Andersson, Brian Masney, Daniel Vetter,
David Airlie, dri-devel, freedreno, Jonathan Marek,
Jordan Crouse, linux-arm-msm, linux-kernel, Sean Paul,
Sharat Masetty, Shawn Guo, Wambui Karuga,
~postmarketos/upstreaming, Craig Tatlor
Tested these patches on Samsung Galaxy S5 along with other patches that
add panel driver and enable GPU support on this device.
Tested-by: Alexey Minnekhanov <alexeymin@postmarketos.org>
On 12/30/20 6:29 PM, Iskren Chernev wrote:
> From: Craig Tatlor <ctatlor97@gmail.com>
>
> vram.size is needed when binding a gpu without an iommu and is defined
> in msm_init_vram(), so run that before binding it.
>
> Signed-off-by: Craig Tatlor <ctatlor97@gmail.com>
> ---
> drivers/gpu/drm/msm/msm_drv.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] drm/msm: Call msm_init_vram before binding the gpu
2020-12-30 15:29 [PATCH 1/2] drm/msm: Call msm_init_vram before binding the gpu Iskren Chernev
` (2 preceding siblings ...)
2021-01-03 6:09 ` Alexey Minnekhanov
@ 2021-03-01 19:59 ` patchwork-bot+linux-arm-msm
3 siblings, 0 replies; 5+ messages in thread
From: patchwork-bot+linux-arm-msm @ 2021-03-01 19:59 UTC (permalink / raw)
To: Iskren Chernev; +Cc: linux-arm-msm
Hello:
This series was applied to qcom/linux.git (refs/heads/for-next):
On Wed, 30 Dec 2020 17:29:42 +0200 you wrote:
> From: Craig Tatlor <ctatlor97@gmail.com>
>
> vram.size is needed when binding a gpu without an iommu and is defined
> in msm_init_vram(), so run that before binding it.
>
> Signed-off-by: Craig Tatlor <ctatlor97@gmail.com>
>
> [...]
Here is the summary with links:
- [1/2] drm/msm: Call msm_init_vram before binding the gpu
https://git.kernel.org/qcom/c/d863f0c7b536
- [2/2] drm/msm: Add modparam to allow vram carveout
https://git.kernel.org/qcom/c/3f7759e7b758
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
^ permalink raw reply [flat|nested] 5+ messages in thread
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2020-12-30 15:29 [PATCH 1/2] drm/msm: Call msm_init_vram before binding the gpu Iskren Chernev
2020-12-30 15:29 ` [PATCH 2/2] drm/msm: Add modparam to allow vram carveout Iskren Chernev
2020-12-30 22:23 ` [PATCH 1/2] drm/msm: Call msm_init_vram before binding the gpu Brian Masney
2021-01-03 6:09 ` Alexey Minnekhanov
2021-03-01 19:59 ` patchwork-bot+linux-arm-msm
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